E-PolyLearning

36. What is the thermal conductivity of apple in W/m K?
a. 0.513
b. 0.613
c. 0.713
d. 0.813
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Answer: (a).0.513

37. What is the thermal conductivity of ice in W/m K?
a. 1.55
b. 1.66
c. 1.77
d. 1.88
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Answer: (d).1.88

38. From the concept of kinetic theory, mean travel velocity of the gas molecules is prescribed by the relation
Where,
G = Universal gas constant
M = Molecular weight of the gas
T = Absolute temperature
a. V = (3M/GT)^1/2
b. V = (3GT/M)^1/2
c. V = (6T/GM)^1/2
d. V = (3GT/2M)^1/2
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Answer: (b).V = (3GT/M)^1/2

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